Si Begg (born 1972) is electronic dance music DJ, musician and record producer Simon Begg, from Leicester, England. His music combines elements of Experimental, Downtempo, Breakbeat Ambient, Drum and bass, Turntablism and Jazz. Begg grew up in Leamington Spa and moved to London in 1991. His recording career began in 1993 and he has used a number of different pseudonyms and band names, and released music in different styles on several record labels.

He has also recorded music for short films, television advertisements and has performed sound design work for television channels including the BBC, Channel 4 and MTV.